Dell Vostro 1510 18 Volts on Power Switch

[sonunigam]

Hello all guys,
I'm facing a strange problem that one Dell Vostro 1510's Motherboard LA-4121P has 18 Volts on Power Switch. 5V ALW and 3.3V ALW are present on PU16 (ISL6237). Please tell me what should i do? Which component is faulty?

[Life Goes On]

Re: Dell Vostro 1510 18 Volts on Power Switch

But what is the problem, laptop don't start of what and if you have the schamtic post it here.

[meritosari]

Re: Dell Vostro 1510 18 Volts on Power Switch

17v is normal at 51_ON# upon plugging in the adapter. It should go low to 3.3v when you press the power button.

voltage is around 17-19v seems normal, then check voltage and signal on KBC when if you press power buttton

[HarryPK]

Re: Dell Vostro 1510 18 Volts on Power Switch

Is charge light on if dc and batre plugged? If no try to change bios IC and reprogram its

[sonunigam]

Re: Dell Vostro 1510 18 Volts on Power Switch

dear meritosari,
How to check voltages and signals on KBC?

[ktmmotocross]

Re: Dell Vostro 1510 18 Volts on Power Switch

replace KBC. Internal short.

[meritosari]

Re: Dell Vostro 1510 18 Volts on Power Switch

Check pin 32 100 117 U28 before and after pressing power button, usually like 3.3v-0v-3.3v. If so, then consider to flash bios as HarryPk said.

[sonunigam]

Re: Dell Vostro 1510 18 Volts on Power Switch

Hurrah,
The BIOS was corrupt. . . I flashed it and everything is ok.

[meritosari]

Re: Dell Vostro 1510 18 Volts on Power Switch

Hurrah,
The BIOS was corrupt. . . I flashed it and everything is ok.

well done, case solved.